package com.xfc.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import cn.hutool.core.date.DateField;
import cn.hutool.core.date.DateUtil;
import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 * 
 * @author xfc
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    
    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }
    
    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 获取当前时间和课表时间周之差
     * @return
     */
    public static int getWeek(int week){
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        int w = cal.get(Calendar.DAY_OF_WEEK)-1;
        //判断当前时间周是否大于配置周
        return week-w;

    }


    /**
     * 获取当前时间是周几
     * @return
     */
    public static int getDayWeek(){
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        int w = cal.get(Calendar.DAY_OF_WEEK)-1;
        if (w==0){
            w=7;
        }
        return w;
    }

    /**
     * 获取这个月需要补几天
     * @return
     */
    public static int getMonthWeek(Date date ){
        int day=0;
        //获取时间是周几
        int week= DateUtil.dayOfWeek(date);
        switch(week){
            case 1 :
                //周天
                day=-7;
                break;
            case 3 :
                day=-1;
                break;
            case 4 :
                day=-2;
                break;
            case 5 :
                day=-3;
                break;
            case 6 :
                day=-4;
                break;
            case 7 :
                day=-5;
                break;
            case 8 :
                day=-6;
                break;
            default :
                day=0;
        }
        return day;
    }


    /**
     * 返回时间之内的时间
     * @param startTime1 开始时间
     * @param endTime1 结束时间
     * @return
     */
    public static final List<String> getMonthDay(Date startTime1,Date endTime1){
        List<String> listStr=new ArrayList<>();
        SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd");
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(endTime1);
        while (startTime1.getTime() <= endTime1.getTime()) {
            listStr.add(format2.format(endTime1));
            tempStart.add(Calendar.DAY_OF_YEAR, -1);
            endTime1 = tempStart.getTime();
        }
        return listStr;
    }

    /**
     *  获取当月的最后一天
     * @param date 时间
     * @return
     */
    public static final Date lastMonthDay(Date date){
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int lastDay = calendar.getActualMaximum(Calendar.DATE);
        calendar.set(Calendar.DAY_OF_MONTH, lastDay);
        return calendar.getTime();
    }

    /**
     *  获取最新7天时间
     * @return
     */
    public static final List<String> getNowTime(){
        Date date = DateUtil.date();
        List<String> list=new ArrayList<>();
        for (int i=0;i<7;i++){
            Date newDate = DateUtil.offset(date, DateField.DAY_OF_MONTH, i);
            list.add( DateUtil.formatDate(newDate));
        }
        return list;

    }

    /**
     * 获取过去第几天的日期
     *
     * @param past
     * @return
     */
    public static String getPastDate(int past) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);
        Date today = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String result = format.format(today);
        return result;
    }

    /**
     * 获取过去几天的日期
     *
     * @param past 天数
     * @return
     */
    public static List<String> getAgoDay(int past) {
        List<String> listDate=new ArrayList<>();
        for (int i=0;i<past;i++){
            listDate.add(getPastDate(i));
        }
        return listDate;
    }



}
